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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.128 by root, Thu Nov 22 12:28:27 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# else
		47	# ifndef EV_USE_MONOTONIC
		48	# define EV_USE_MONOTONIC 0
		49	# endif
		50	# ifndef EV_USE_REALTIME
		51	# define EV_USE_REALTIME 0
		52	# endif
		53	# endif
		54
		55	# ifndef EV_USE_SELECT
		56	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		57	# define EV_USE_SELECT 1
		58	# else
		59	# define EV_USE_SELECT 0
		60	# endif
		61	# endif
		62
		63	# ifndef EV_USE_POLL
		64	# if HAVE_POLL && HAVE_POLL_H
		65	# define EV_USE_POLL 1
		66	# else
		67	# define EV_USE_POLL 0
		68	# endif
		69	# endif
		70
		71	# ifndef EV_USE_EPOLL
		72	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		73	# define EV_USE_EPOLL 1
		74	# else
		75	# define EV_USE_EPOLL 0
		76	# endif
		77	# endif
		78
		79	# ifndef EV_USE_KQUEUE
		80	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		81	# define EV_USE_KQUEUE 1
		82	# else
		83	# define EV_USE_KQUEUE 0
		84	# endif
		85	# endif
		86
		87	# ifndef EV_USE_PORT
		88	# if HAVE_PORT_H && HAVE_PORT_CREATE
		89	# define EV_USE_PORT 1
		90	# else
		91	# define EV_USE_PORT 0
		92	# endif
		93	# endif
		94
		95	#endif
		96
1	#include <math.h>	97	#include <math.h>
2	#include <stdlib.h>	98	#include <stdlib.h>
		99	#include <fcntl.h>
		100	#include <stddef.h>
3		101
4	#include <stdio.h>	102	#include <stdio.h>
5		103
		104	#include <assert.h>
6	#include <errno.h>	105	#include <errno.h>
7	#include <sys/time.h>	106	#include <sys/types.h>
8	#include <time.h>	107	#include <time.h>
9		108
		109	#include <signal.h>
		110
		111	#ifndef _WIN32
		112	# include <unistd.h>
		113	# include <sys/time.h>
		114	# include <sys/wait.h>
		115	#else
		116	# define WIN32_LEAN_AND_MEAN
		117	# include <windows.h>
		118	# ifndef EV_SELECT_IS_WINSOCKET
		119	# define EV_SELECT_IS_WINSOCKET 1
		120	# endif
		121	#endif
		122
		123	/**/
		124
		125	#ifndef EV_USE_MONOTONIC
		126	# define EV_USE_MONOTONIC 0
		127	#endif
		128
		129	#ifndef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
		131	#endif
		132
		133	#ifndef EV_USE_SELECT
		134	# define EV_USE_SELECT 1
		135	#endif
		136
		137	#ifndef EV_USE_POLL
		138	# ifdef _WIN32
		139	# define EV_USE_POLL 0
		140	# else
		141	# define EV_USE_POLL 1
		142	# endif
		143	#endif
		144
		145	#ifndef EV_USE_EPOLL
		146	# define EV_USE_EPOLL 0
		147	#endif
		148
		149	#ifndef EV_USE_KQUEUE
		150	# define EV_USE_KQUEUE 0
		151	#endif
		152
		153	#ifndef EV_USE_PORT
		154	# define EV_USE_PORT 0
		155	#endif
		156
		157	/**/
		158
		159	/* darwin simply cannot be helped */
		160	#ifdef __APPLE__
		161	# undef EV_USE_POLL
		162	# undef EV_USE_KQUEUE
		163	#endif
		164
10	#ifdef CLOCK_MONOTONIC	165	#ifndef CLOCK_MONOTONIC
		166	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	167	# define EV_USE_MONOTONIC 0
12	#endif	168	#endif
13		169
14	#define HAVE_EPOLL 1	170	#ifndef CLOCK_REALTIME
		171	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	172	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	173	#endif
17		174
18	#define MAX_BLOCKTIME 60.	175	#if EV_SELECT_IS_WINSOCKET
		176	# include <winsock.h>
		177	#endif
19		178
		179	/**/
		180
		181	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		182	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		183	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		184	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
		185
		186	#ifdef EV_H
		187	# include EV_H
		188	#else
20	#include "ev.h"	189	# include "ev.h"
		190	#endif
21		191
		192	#if __GNUC__ >= 3
		193	# define expect(expr,value) __builtin_expect ((expr),(value))
		194	# define inline static inline
		195	#else
		196	# define expect(expr,value) (expr)
		197	# define inline static
		198	#endif
		199
		200	#define expect_false(expr) expect ((expr) != 0, 0)
		201	#define expect_true(expr) expect ((expr) != 0, 1)
		202
		203	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		204	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		205
		206	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		207	#define EMPTY2(a,b) /* used to suppress some warnings */
		208
22	struct ev_watcher {	209	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	210	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	211	typedef struct ev_watcher_time *WT;
28	};
29		212
		213	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		214
		215	#ifdef _WIN32
		216	# include "ev_win32.c"
		217	#endif
		218
		219	/*****************************************************************************/
		220
		221	static void (*syserr_cb)(const char *msg);
		222
		223	void ev_set_syserr_cb (void (*cb)(const char *msg))
		224	{
		225	syserr_cb = cb;
		226	}
		227
		228	static void
		229	syserr (const char *msg)
		230	{
		231	if (!msg)
		232	msg = "(libev) system error";
		233
		234	if (syserr_cb)
		235	syserr_cb (msg);
		236	else
		237	{
		238	perror (msg);
		239	abort ();
		240	}
		241	}
		242
		243	static void *(*alloc)(void *ptr, long size);
		244
		245	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		246	{
		247	alloc = cb;
		248	}
		249
		250	static void *
		251	ev_realloc (void *ptr, long size)
		252	{
		253	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		254
		255	if (!ptr && size)
		256	{
		257	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		258	abort ();
		259	}
		260
		261	return ptr;
		262	}
		263
		264	#define ev_malloc(size) ev_realloc (0, (size))
		265	#define ev_free(ptr) ev_realloc ((ptr), 0)
		266
		267	/*****************************************************************************/
		268
		269	typedef struct
		270	{
		271	WL head;
		272	unsigned char events;
		273	unsigned char reify;
		274	#if EV_SELECT_IS_WINSOCKET
		275	SOCKET handle;
		276	#endif
		277	} ANFD;
		278
		279	typedef struct
		280	{
		281	W w;
		282	int events;
		283	} ANPENDING;
		284
		285	#if EV_MULTIPLICITY
		286
		287	struct ev_loop
		288	{
		289	ev_tstamp ev_rt_now;
		290	#define ev_rt_now ((loop)->ev_rt_now)
		291	#define VAR(name,decl) decl;
		292	#include "ev_vars.h"
		293	#undef VAR
		294	};
		295	#include "ev_wrap.h"
		296
		297	static struct ev_loop default_loop_struct;
		298	struct ev_loop *ev_default_loop_ptr;
		299
		300	#else
		301
30	ev_tstamp ev_now;	302	ev_tstamp ev_rt_now;
31	int ev_method;	303	#define VAR(name,decl) static decl;
		304	#include "ev_vars.h"
		305	#undef VAR
32		306
33	static int have_monotonic; /* runtime */	307	static int ev_default_loop_ptr;
34		308
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	309	#endif
36	static void (*method_reify)(void);	310
37	static void (*method_poll)(ev_tstamp timeout);	311	/*****************************************************************************/
38		312
39	ev_tstamp	313	ev_tstamp
40	ev_time (void)	314	ev_time (void)
41	{	315	{
42	#if HAVE_REALTIME	316	#if EV_USE_REALTIME
43	struct timespec ts;	317	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	318	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	319	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	320	#else
47	struct timeval tv;	321	struct timeval tv;
48	gettimeofday (&tv, 0);	322	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	323	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	324	#endif
51	}	325	}
52		326
53	static ev_tstamp	327	inline ev_tstamp
54	get_clock (void)	328	get_clock (void)
55	{	329	{
56	#if HAVE_MONOTONIC	330	#if EV_USE_MONOTONIC
57	if (have_monotonic)	331	if (expect_true (have_monotonic))
58	{	332	{
59	struct timespec ts;	333	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	334	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	335	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	336	}
63	#endif	337	#endif
64		338
65	return ev_time ();	339	return ev_time ();
66	}	340	}
67		341
		342	#if EV_MULTIPLICITY
		343	ev_tstamp
		344	ev_now (EV_P)
		345	{
		346	return ev_rt_now;
		347	}
		348	#endif
		349
		350	#define array_roundsize(type,n) (((n) | 4) & ~3)
		351
68	#define array_needsize(base,cur,cnt,init) \	352	#define array_needsize(type,base,cur,cnt,init) \
69	if ((cnt) > cur) \	353	if (expect_false ((cnt) > cur)) \
70	{ \	354	{ \
71	int newcnt = cur ? cur << 1 : 16; \	355	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	356	do \
		357	{ \
		358	newcnt = array_roundsize (type, newcnt << 1); \
		359	} \
		360	while ((cnt) > newcnt); \
		361	\
73	base = realloc (base, sizeof (*base) * (newcnt)); \	362	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
74	init (base + cur, newcnt - cur); \	363	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	364	cur = newcnt; \
76	}	365	}
77		366
78	typedef struct	367	#define array_slim(type,stem) \
79	{	368	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
80	struct ev_io *head;	369	{ \
81	unsigned char wev, rev; /* want, received event set */	370	stem ## max = array_roundsize (stem ## cnt >> 1); \
82	} ANFD;	371	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		372	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		373	}
83		374
84	static ANFD *anfds;	375	#define array_free(stem, idx) \
85	static int anfdmax;	376	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
86		377
87	static int *fdchanges;	378	/*****************************************************************************/
88	static int fdchangemax, fdchangecnt;
89		379
90	static void	380	static void
91	anfds_init (ANFD *base, int count)	381	anfds_init (ANFD *base, int count)
92	{	382	{
93	while (count--)	383	while (count--)
94	{	384	{
95	base->head = 0;	385	base->head = 0;
96	base->wev = base->rev = EV_NONE;	386	base->events = EV_NONE;
		387	base->reify = 0;
		388
97	++base;	389	++base;
98	}	390	}
99	}	391	}
100		392
101	typedef struct	393	void
		394	ev_feed_event (EV_P_ void *w, int revents)
102	{	395	{
103	struct ev_watcher *w;	396	W w_ = (W)w;
104	int events;
105	} ANPENDING;
106		397
107	static ANPENDING *pendings;	398	if (expect_false (w_->pending))
108	static int pendingmax, pendingcnt;	399	{
		400	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		401	return;
		402	}
109		403
110	static void
111	event (struct ev_watcher *w, int events)
112	{
113	w->pending = ++pendingcnt;	404	w_->pending = ++pendingcnt [ABSPRI (w_)];
114	array_needsize (pendings, pendingmax, pendingcnt, );	405	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
115	pendings [pendingcnt - 1].w = w;	406	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
116	pendings [pendingcnt - 1].events = events;	407	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
117	}	408	}
118		409
119	static void	410	static void
		411	queue_events (EV_P_ W *events, int eventcnt, int type)
		412	{
		413	int i;
		414
		415	for (i = 0; i < eventcnt; ++i)
		416	ev_feed_event (EV_A_ events [i], type);
		417	}
		418
		419	inline void
120	fd_event (int fd, int events)	420	fd_event (EV_P_ int fd, int revents)
121	{	421	{
122	ANFD *anfd = anfds + fd;	422	ANFD *anfd = anfds + fd;
123	struct ev_io *w;	423	struct ev_io *w;
124		424
125	for (w = anfd->head; w; w = w->next)	425	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
126	{	426	{
127	int ev = w->events & events;	427	int ev = w->events & revents;
128		428
129	if (ev)	429	if (ev)
130	event ((struct ev_watcher *)w, ev);	430	ev_feed_event (EV_A_ (W)w, ev);
		431	}
		432	}
		433
		434	void
		435	ev_feed_fd_event (EV_P_ int fd, int revents)
		436	{
		437	fd_event (EV_A_ fd, revents);
		438	}
		439
		440	/*****************************************************************************/
		441
		442	inline void
		443	fd_reify (EV_P)
		444	{
		445	int i;
		446
		447	for (i = 0; i < fdchangecnt; ++i)
		448	{
		449	int fd = fdchanges [i];
		450	ANFD *anfd = anfds + fd;
		451	struct ev_io *w;
		452
		453	int events = 0;
		454
		455	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		456	events |= w->events;
		457
		458	#if EV_SELECT_IS_WINSOCKET
		459	if (events)
		460	{
		461	unsigned long argp;
		462	anfd->handle = _get_osfhandle (fd);
		463	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		464	}
		465	#endif
		466
		467	anfd->reify = 0;
		468
		469	method_modify (EV_A_ fd, anfd->events, events);
		470	anfd->events = events;
		471	}
		472
		473	fdchangecnt = 0;
		474	}
		475
		476	static void
		477	fd_change (EV_P_ int fd)
		478	{
		479	if (expect_false (anfds [fd].reify))
		480	return;
		481
		482	anfds [fd].reify = 1;
		483
		484	++fdchangecnt;
		485	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		486	fdchanges [fdchangecnt - 1] = fd;
		487	}
		488
		489	static void
		490	fd_kill (EV_P_ int fd)
		491	{
		492	struct ev_io *w;
		493
		494	while ((w = (struct ev_io *)anfds [fd].head))
		495	{
		496	ev_io_stop (EV_A_ w);
		497	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		498	}
		499	}
		500
		501	inline int
		502	fd_valid (int fd)
		503	{
		504	#ifdef _WIN32
		505	return _get_osfhandle (fd) != -1;
		506	#else
		507	return fcntl (fd, F_GETFD) != -1;
		508	#endif
		509	}
		510
		511	/* called on EBADF to verify fds */
		512	static void
		513	fd_ebadf (EV_P)
		514	{
		515	int fd;
		516
		517	for (fd = 0; fd < anfdmax; ++fd)
		518	if (anfds [fd].events)
		519	if (!fd_valid (fd) == -1 && errno == EBADF)
		520	fd_kill (EV_A_ fd);
		521	}
		522
		523	/* called on ENOMEM in select/poll to kill some fds and retry */
		524	static void
		525	fd_enomem (EV_P)
		526	{
		527	int fd;
		528
		529	for (fd = anfdmax; fd--; )
		530	if (anfds [fd].events)
		531	{
		532	fd_kill (EV_A_ fd);
		533	return;
131	}	534	}
132	}	535	}
133		536
134	static struct ev_timer **timers;	537	/* usually called after fork if method needs to re-arm all fds from scratch */
135	static int timermax, timercnt;
136
137	static void	538	static void
138	upheap (int k)	539	fd_rearm_all (EV_P)
139	{	540	{
140	struct ev_timer *w = timers [k];	541	int fd;
141		542
		543	/* this should be highly optimised to not do anything but set a flag */
		544	for (fd = 0; fd < anfdmax; ++fd)
		545	if (anfds [fd].events)
		546	{
		547	anfds [fd].events = 0;
		548	fd_change (EV_A_ fd);
		549	}
		550	}
		551
		552	/*****************************************************************************/
		553
		554	static void
		555	upheap (WT *heap, int k)
		556	{
		557	WT w = heap [k];
		558
142	while (k && timers [k >> 1]->at > w->at)	559	while (k && heap [k >> 1]->at > w->at)
143	{	560	{
144	timers [k] = timers [k >> 1];	561	heap [k] = heap [k >> 1];
145	timers [k]->active = k + 1;	562	((W)heap [k])->active = k + 1;
146	k >>= 1;	563	k >>= 1;
147	}	564	}
148		565
149	timers [k] = w;	566	heap [k] = w;
150	timers [k]->active = k + 1;	567	((W)heap [k])->active = k + 1;
151		568
152	}	569	}
153		570
154	static void	571	static void
155	downheap (int k)	572	downheap (WT *heap, int N, int k)
156	{	573	{
157	struct ev_timer *w = timers [k];	574	WT w = heap [k];
158		575
159	while (k < (timercnt >> 1))	576	while (k < (N >> 1))
160	{	577	{
161	int j = k << 1;	578	int j = k << 1;
162		579
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	580	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
164	++j;	581	++j;
165		582
166	if (w->at <= timers [j]->at)	583	if (w->at <= heap [j]->at)
167	break;	584	break;
168		585
169	timers [k] = timers [j];	586	heap [k] = heap [j];
170	timers [k]->active = k + 1;	587	((W)heap [k])->active = k + 1;
171	k = j;	588	k = j;
172	}	589	}
173		590
174	timers [k] = w;	591	heap [k] = w;
175	timers [k]->active = k + 1;	592	((W)heap [k])->active = k + 1;
176	}	593	}
177		594
178	static struct ev_signal **signals;	595	inline void
		596	adjustheap (WT *heap, int N, int k)
		597	{
		598	upheap (heap, k);
		599	downheap (heap, N, k);
		600	}
		601
		602	/*****************************************************************************/
		603
		604	typedef struct
		605	{
		606	WL head;
		607	sig_atomic_t volatile gotsig;
		608	} ANSIG;
		609
		610	static ANSIG *signals;
179	static int signalmax, signalcnt;	611	static int signalmax;
180		612
		613	static int sigpipe [2];
		614	static sig_atomic_t volatile gotsig;
		615	static struct ev_io sigev;
		616
181	static void	617	static void
182	signals_init (struct ev_signal **base, int count)	618	signals_init (ANSIG *base, int count)
183	{	619	{
184	while (count--)	620	while (count--)
185	*base++ = 0;	621	{
186	}	622	base->head = 0;
		623	base->gotsig = 0;
187		624
		625	++base;
		626	}
		627	}
		628
		629	static void
		630	sighandler (int signum)
		631	{
		632	#if _WIN32
		633	signal (signum, sighandler);
		634	#endif
		635
		636	signals [signum - 1].gotsig = 1;
		637
		638	if (!gotsig)
		639	{
		640	int old_errno = errno;
		641	gotsig = 1;
		642	write (sigpipe [1], &signum, 1);
		643	errno = old_errno;
		644	}
		645	}
		646
		647	void
		648	ev_feed_signal_event (EV_P_ int signum)
		649	{
		650	WL w;
		651
		652	#if EV_MULTIPLICITY
		653	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		654	#endif
		655
		656	--signum;
		657
		658	if (signum < 0 || signum >= signalmax)
		659	return;
		660
		661	signals [signum].gotsig = 0;
		662
		663	for (w = signals [signum].head; w; w = w->next)
		664	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		665	}
		666
		667	static void
		668	sigcb (EV_P_ struct ev_io *iow, int revents)
		669	{
		670	int signum;
		671
		672	read (sigpipe [0], &revents, 1);
		673	gotsig = 0;
		674
		675	for (signum = signalmax; signum--; )
		676	if (signals [signum].gotsig)
		677	ev_feed_signal_event (EV_A_ signum + 1);
		678	}
		679
		680	static void
		681	fd_intern (int fd)
		682	{
		683	#ifdef _WIN32
		684	int arg = 1;
		685	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		686	#else
		687	fcntl (fd, F_SETFD, FD_CLOEXEC);
		688	fcntl (fd, F_SETFL, O_NONBLOCK);
		689	#endif
		690	}
		691
		692	static void
		693	siginit (EV_P)
		694	{
		695	fd_intern (sigpipe [0]);
		696	fd_intern (sigpipe [1]);
		697
		698	ev_io_set (&sigev, sigpipe [0], EV_READ);
		699	ev_io_start (EV_A_ &sigev);
		700	ev_unref (EV_A); /* child watcher should not keep loop alive */
		701	}
		702
		703	/*****************************************************************************/
		704
		705	static struct ev_child *childs [PID_HASHSIZE];
		706
		707	#ifndef _WIN32
		708
		709	static struct ev_signal childev;
		710
		711	#ifndef WCONTINUED
		712	# define WCONTINUED 0
		713	#endif
		714
		715	static void
		716	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		717	{
		718	struct ev_child *w;
		719
		720	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		721	if (w->pid == pid || !w->pid)
		722	{
		723	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		724	w->rpid = pid;
		725	w->rstatus = status;
		726	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		727	}
		728	}
		729
		730	static void
		731	childcb (EV_P_ struct ev_signal *sw, int revents)
		732	{
		733	int pid, status;
		734
		735	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		736	{
		737	/* make sure we are called again until all childs have been reaped */
		738	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		739
		740	child_reap (EV_A_ sw, pid, pid, status);
		741	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		742	}
		743	}
		744
		745	#endif
		746
		747	/*****************************************************************************/
		748
		749	#if EV_USE_PORT
		750	# include "ev_port.c"
		751	#endif
		752	#if EV_USE_KQUEUE
		753	# include "ev_kqueue.c"
		754	#endif
188	#if HAVE_EPOLL	755	#if EV_USE_EPOLL
189	# include "ev_epoll.c"	756	# include "ev_epoll.c"
190	#endif	757	#endif
		758	#if EV_USE_POLL
		759	# include "ev_poll.c"
		760	#endif
191	#if HAVE_SELECT	761	#if EV_USE_SELECT
192	# include "ev_select.c"	762	# include "ev_select.c"
193	#endif	763	#endif
194		764
195	int ev_init (int flags)	765	int
		766	ev_version_major (void)
196	{	767	{
		768	return EV_VERSION_MAJOR;
		769	}
		770
		771	int
		772	ev_version_minor (void)
		773	{
		774	return EV_VERSION_MINOR;
		775	}
		776
		777	/* return true if we are running with elevated privileges and should ignore env variables */
		778	static int
		779	enable_secure (void)
		780	{
		781	#ifdef _WIN32
		782	return 0;
		783	#else
		784	return getuid () != geteuid ()
		785	|| getgid () != getegid ();
		786	#endif
		787	}
		788
		789	unsigned int
		790	ev_method (EV_P)
		791	{
		792	return method;
		793	}
		794
		795	static void
		796	loop_init (EV_P_ unsigned int flags)
		797	{
		798	if (!method)
		799	{
197	#if HAVE_MONOTONIC	800	#if EV_USE_MONOTONIC
198	{	801	{
199	struct timespec ts;	802	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	803	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	804	have_monotonic = 1;
202	}	805	}
203	#endif	806	#endif
204		807
205	ev_now = ev_time ();	808	ev_rt_now = ev_time ();
		809	mn_now = get_clock ();
		810	now_floor = mn_now;
		811	rtmn_diff = ev_rt_now - mn_now;
206		812
		813	if (!(flags & EVFLAG_NOENV)
		814	&& !enable_secure ()
		815	&& getenv ("LIBEV_FLAGS"))
		816	flags = atoi (getenv ("LIBEV_FLAGS"));
		817
		818	if (!(flags & EVMETHOD_ALL))
		819	{
		820	flags |= EVMETHOD_ALL;
		821	#if EV_USE_KQUEUE && !defined (__NetBSD__)
		822	/* kqueue is borked on everything but netbsd apparently */
		823	/* it usually doesn't work correctly on anything but sockets and pipes */
		824	flags &= ~EVMETHOD_KQUEUE;
		825	#endif
		826	}
		827
		828	method = 0;
		829	#if EV_USE_PORT
		830	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);
		831	#endif
		832	#if EV_USE_KQUEUE
		833	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		834	#endif
207	#if HAVE_EPOLL	835	#if EV_USE_EPOLL
208	if (epoll_init (flags))	836	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
209	return ev_method;
210	#endif	837	#endif
		838	#if EV_USE_POLL
		839	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		840	#endif
211	#if HAVE_SELECT	841	#if EV_USE_SELECT
212	if (select_init (flags))	842	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
213	return ev_method;
214	#endif	843	#endif
215		844
216	ev_method = EVMETHOD_NONE;	845	ev_init (&sigev, sigcb);
217	return ev_method;	846	ev_set_priority (&sigev, EV_MAXPRI);
		847	}
218	}	848	}
219		849
220	void ev_prefork (void)
221	{
222	}
223
224	void ev_postfork_parent (void)
225	{
226	}
227
228	void ev_postfork_child (void)
229	{
230	#if HAVE_EPOLL
231	epoll_postfork_child ();
232	#endif
233	}
234
235	static void	850	static void
236	call_pending ()	851	loop_destroy (EV_P)
237	{	852	{
238	int i;	853	int i;
239		854
240	for (i = 0; i < pendingcnt; ++i)	855	#if EV_USE_PORT
		856	if (method == EVMETHOD_PORT ) port_destroy (EV_A);
		857	#endif
		858	#if EV_USE_KQUEUE
		859	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		860	#endif
		861	#if EV_USE_EPOLL
		862	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		863	#endif
		864	#if EV_USE_POLL
		865	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		866	#endif
		867	#if EV_USE_SELECT
		868	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		869	#endif
		870
		871	for (i = NUMPRI; i--; )
		872	array_free (pending, [i]);
		873
		874	/* have to use the microsoft-never-gets-it-right macro */
		875	array_free (fdchange, EMPTY0);
		876	array_free (timer, EMPTY0);
		877	#if EV_PERIODICS
		878	array_free (periodic, EMPTY0);
		879	#endif
		880	array_free (idle, EMPTY0);
		881	array_free (prepare, EMPTY0);
		882	array_free (check, EMPTY0);
		883
		884	method = 0;
		885	}
		886
		887	static void
		888	loop_fork (EV_P)
		889	{
		890	#if EV_USE_PORT
		891	if (method == EVMETHOD_PORT ) port_fork (EV_A);
		892	#endif
		893	#if EV_USE_KQUEUE
		894	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		895	#endif
		896	#if EV_USE_EPOLL
		897	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		898	#endif
		899
		900	if (ev_is_active (&sigev))
		901	{
		902	/* default loop */
		903
		904	ev_ref (EV_A);
		905	ev_io_stop (EV_A_ &sigev);
		906	close (sigpipe [0]);
		907	close (sigpipe [1]);
		908
		909	while (pipe (sigpipe))
		910	syserr ("(libev) error creating pipe");
		911
		912	siginit (EV_A);
241	{	913	}
242	ANPENDING *p = pendings + i;
243		914
244	if (p->w)	915	postfork = 0;
		916	}
		917
		918	#if EV_MULTIPLICITY
		919	struct ev_loop *
		920	ev_loop_new (unsigned int flags)
		921	{
		922	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		923
		924	memset (loop, 0, sizeof (struct ev_loop));
		925
		926	loop_init (EV_A_ flags);
		927
		928	if (ev_method (EV_A))
		929	return loop;
		930
		931	return 0;
		932	}
		933
		934	void
		935	ev_loop_destroy (EV_P)
		936	{
		937	loop_destroy (EV_A);
		938	ev_free (loop);
		939	}
		940
		941	void
		942	ev_loop_fork (EV_P)
		943	{
		944	postfork = 1;
		945	}
		946
		947	#endif
		948
		949	#if EV_MULTIPLICITY
		950	struct ev_loop *
		951	ev_default_loop_init (unsigned int flags)
		952	#else
		953	int
		954	ev_default_loop (unsigned int flags)
		955	#endif
		956	{
		957	if (sigpipe [0] == sigpipe [1])
		958	if (pipe (sigpipe))
		959	return 0;
		960
		961	if (!ev_default_loop_ptr)
		962	{
		963	#if EV_MULTIPLICITY
		964	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		965	#else
		966	ev_default_loop_ptr = 1;
		967	#endif
		968
		969	loop_init (EV_A_ flags);
		970
		971	if (ev_method (EV_A))
245	{	972	{
246	p->w->pending = 0;	973	siginit (EV_A);
247	p->w->cb (p->w, p->events);	974
		975	#ifndef _WIN32
		976	ev_signal_init (&childev, childcb, SIGCHLD);
		977	ev_set_priority (&childev, EV_MAXPRI);
		978	ev_signal_start (EV_A_ &childev);
		979	ev_unref (EV_A); /* child watcher should not keep loop alive */
		980	#endif
248	}	981	}
		982	else
		983	ev_default_loop_ptr = 0;
		984	}
		985
		986	return ev_default_loop_ptr;
		987	}
		988
		989	void
		990	ev_default_destroy (void)
		991	{
		992	#if EV_MULTIPLICITY
		993	struct ev_loop *loop = ev_default_loop_ptr;
		994	#endif
		995
		996	#ifndef _WIN32
		997	ev_ref (EV_A); /* child watcher */
		998	ev_signal_stop (EV_A_ &childev);
		999	#endif
		1000
		1001	ev_ref (EV_A); /* signal watcher */
		1002	ev_io_stop (EV_A_ &sigev);
		1003
		1004	close (sigpipe [0]); sigpipe [0] = 0;
		1005	close (sigpipe [1]); sigpipe [1] = 0;
		1006
		1007	loop_destroy (EV_A);
		1008	}
		1009
		1010	void
		1011	ev_default_fork (void)
		1012	{
		1013	#if EV_MULTIPLICITY
		1014	struct ev_loop *loop = ev_default_loop_ptr;
		1015	#endif
		1016
		1017	if (method)
		1018	postfork = 1;
		1019	}
		1020
		1021	/*****************************************************************************/
		1022
		1023	static int
		1024	any_pending (EV_P)
		1025	{
		1026	int pri;
		1027
		1028	for (pri = NUMPRI; pri--; )
		1029	if (pendingcnt [pri])
		1030	return 1;
		1031
		1032	return 0;
		1033	}
		1034
		1035	inline void
		1036	call_pending (EV_P)
		1037	{
		1038	int pri;
		1039
		1040	for (pri = NUMPRI; pri--; )
		1041	while (pendingcnt [pri])
		1042	{
		1043	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1044
		1045	if (expect_true (p->w))
		1046	{
		1047	p->w->pending = 0;
		1048	EV_CB_INVOKE (p->w, p->events);
		1049	}
249	}	1050	}
250
251	pendingcnt = 0;
252	}	1051	}
253		1052
254	static void	1053	inline void
255	timer_reify (void)	1054	timers_reify (EV_P)
256	{	1055	{
257	while (timercnt && timers [0]->at <= ev_now)	1056	while (timercnt && ((WT)timers [0])->at <= mn_now)
258	{	1057	{
259	struct ev_timer *w = timers [0];	1058	struct ev_timer *w = timers [0];
260		1059
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	1060	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		1061
262	/* first reschedule timer */	1062	/* first reschedule or stop timer */
263	if (w->repeat)	1063	if (w->repeat)
264	{	1064	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	1065	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
266	if (w->is_abs)	1066
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	1067	((WT)w)->at += w->repeat;
		1068	if (((WT)w)->at < mn_now)
		1069	((WT)w)->at = mn_now;
270		1070
271	fprintf (stderr, "b %f\n", w->at);//D	1071	downheap ((WT *)timers, timercnt, 0);
272
273	downheap (0);
274	}	1072	}
275	else	1073	else
		1074	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1075
		1076	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1077	}
		1078	}
		1079
		1080	#if EV_PERIODICS
		1081	inline void
		1082	periodics_reify (EV_P)
		1083	{
		1084	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1085	{
		1086	struct ev_periodic *w = periodics [0];
		1087
		1088	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1089
		1090	/* first reschedule or stop timer */
		1091	if (w->reschedule_cb)
276	{	1092	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D	1093	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
278	evtimer_stop (w); /* nonrepeating: stop timer */	1094	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1095	downheap ((WT *)periodics, periodiccnt, 0);
279	}	1096	}
		1097	else if (w->interval)
		1098	{
		1099	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1100	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1101	downheap ((WT *)periodics, periodiccnt, 0);
		1102	}
		1103	else
		1104	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
280		1105
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	1106	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1107	}
		1108	}
		1109
		1110	static void
		1111	periodics_reschedule (EV_P)
		1112	{
		1113	int i;
		1114
		1115	/* adjust periodics after time jump */
		1116	for (i = 0; i < periodiccnt; ++i)
282	}	1117	{
283	}	1118	struct ev_periodic *w = periodics [i];
284		1119
285	int ev_loop_done;	1120	if (w->reschedule_cb)
		1121	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1122	else if (w->interval)
		1123	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1124	}
286		1125
		1126	/* now rebuild the heap */
		1127	for (i = periodiccnt >> 1; i--; )
		1128	downheap ((WT *)periodics, periodiccnt, i);
		1129	}
		1130	#endif
		1131
		1132	inline int
		1133	time_update_monotonic (EV_P)
		1134	{
		1135	mn_now = get_clock ();
		1136
		1137	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1138	{
		1139	ev_rt_now = rtmn_diff + mn_now;
		1140	return 0;
		1141	}
		1142	else
		1143	{
		1144	now_floor = mn_now;
		1145	ev_rt_now = ev_time ();
		1146	return 1;
		1147	}
		1148	}
		1149
		1150	inline void
		1151	time_update (EV_P)
		1152	{
		1153	int i;
		1154
		1155	#if EV_USE_MONOTONIC
		1156	if (expect_true (have_monotonic))
		1157	{
		1158	if (time_update_monotonic (EV_A))
		1159	{
		1160	ev_tstamp odiff = rtmn_diff;
		1161
		1162	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1163	{
		1164	rtmn_diff = ev_rt_now - mn_now;
		1165
		1166	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1167	return; /* all is well */
		1168
		1169	ev_rt_now = ev_time ();
		1170	mn_now = get_clock ();
		1171	now_floor = mn_now;
		1172	}
		1173
		1174	# if EV_PERIODICS
		1175	periodics_reschedule (EV_A);
		1176	# endif
		1177	/* no timer adjustment, as the monotonic clock doesn't jump */
		1178	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1179	}
		1180	}
		1181	else
		1182	#endif
		1183	{
		1184	ev_rt_now = ev_time ();
		1185
		1186	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1187	{
		1188	#if EV_PERIODICS
		1189	periodics_reschedule (EV_A);
		1190	#endif
		1191
		1192	/* adjust timers. this is easy, as the offset is the same for all */
		1193	for (i = 0; i < timercnt; ++i)
		1194	((WT)timers [i])->at += ev_rt_now - mn_now;
		1195	}
		1196
		1197	mn_now = ev_rt_now;
		1198	}
		1199	}
		1200
		1201	void
		1202	ev_ref (EV_P)
		1203	{
		1204	++activecnt;
		1205	}
		1206
		1207	void
		1208	ev_unref (EV_P)
		1209	{
		1210	--activecnt;
		1211	}
		1212
		1213	static int loop_done;
		1214
		1215	void
287	int ev_loop (int flags)	1216	ev_loop (EV_P_ int flags)
288	{	1217	{
289	double block;	1218	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	1219	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
291		1220
292	do	1221	while (activecnt)
293	{	1222	{
		1223	/* queue check watchers (and execute them) */
		1224	if (expect_false (preparecnt))
		1225	{
		1226	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1227	call_pending (EV_A);
		1228	}
		1229
		1230	/* we might have forked, so reify kernel state if necessary */
		1231	if (expect_false (postfork))
		1232	loop_fork (EV_A);
		1233
294	/* update fd-related kernel structures */	1234	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	1235	fd_reify (EV_A);
296		1236
297	/* calculate blocking time */	1237	/* calculate blocking time */
		1238
		1239	/* we only need this for !monotonic clock or timers, but as we basically
		1240	always have timers, we just calculate it always */
		1241	#if EV_USE_MONOTONIC
		1242	if (expect_true (have_monotonic))
		1243	time_update_monotonic (EV_A);
		1244	else
		1245	#endif
		1246	{
298	ev_now = ev_time ();	1247	ev_rt_now = ev_time ();
		1248	mn_now = ev_rt_now;
		1249	}
299		1250
300	if (flags & EVLOOP_NONBLOCK)	1251	if (flags & EVLOOP_NONBLOCK || idlecnt)
301	block = 0.;	1252	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	1253	else
305	{	1254	{
		1255	block = MAX_BLOCKTIME;
		1256
		1257	if (timercnt)
		1258	{
306	block = timers [0]->at - ev_now + method_fudge;	1259	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1260	if (block > to) block = to;
		1261	}
		1262
		1263	#if EV_PERIODICS
		1264	if (periodiccnt)
		1265	{
		1266	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
		1267	if (block > to) block = to;
		1268	}
		1269	#endif
		1270
307	if (block < 0.) block = 0.;	1271	if (expect_false (block < 0.)) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	1272	}
310		1273
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	1274	method_poll (EV_A_ block);
313		1275
		1276	/* update ev_rt_now, do magic */
		1277	time_update (EV_A);
		1278
314	/* put pending timers into pendign queue and reschedule them */	1279	/* queue pending timers and reschedule them */
315	timer_reify ();	1280	timers_reify (EV_A); /* relative timers called last */
		1281	#if EV_PERIODICS
		1282	periodics_reify (EV_A); /* absolute timers called first */
		1283	#endif
316		1284
317	ev_now = ev_time ();	1285	/* queue idle watchers unless io or timers are pending */
		1286	if (idlecnt && !any_pending (EV_A))
		1287	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1288
		1289	/* queue check watchers, to be executed first */
		1290	if (expect_false (checkcnt))
		1291	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1292
318	call_pending ();	1293	call_pending (EV_A);
319	}
320	while (!ev_loop_done);
321	}
322		1294
323	static void	1295	if (expect_false (loop_done))
324	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1296	break;
		1297	}
		1298
		1299	if (loop_done != 2)
		1300	loop_done = 0;
		1301	}
		1302
		1303	void
		1304	ev_unloop (EV_P_ int how)
		1305	{
		1306	loop_done = how;
		1307	}
		1308
		1309	/*****************************************************************************/
		1310
		1311	inline void
		1312	wlist_add (WL *head, WL elem)
325	{	1313	{
326	elem->next = *head;	1314	elem->next = *head;
327	*head = elem;	1315	*head = elem;
328	}	1316	}
329		1317
330	static void	1318	inline void
331	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1319	wlist_del (WL *head, WL elem)
332	{	1320	{
333	while (*head)	1321	while (*head)
334	{	1322	{
335	if (*head == elem)	1323	if (*head == elem)
336	{	1324	{
…		…
340		1328
341	head = &(*head)->next;	1329	head = &(*head)->next;
342	}	1330	}
343	}	1331	}
344		1332
345	static void	1333	inline void
346	ev_start (struct ev_watcher *w, int active)	1334	ev_clear_pending (EV_P_ W w)
347	{	1335	{
		1336	if (w->pending)
		1337	{
		1338	pendings [ABSPRI (w)][w->pending - 1].w = 0;
348	w->pending = 0;	1339	w->pending = 0;
		1340	}
		1341	}
		1342
		1343	inline void
		1344	ev_start (EV_P_ W w, int active)
		1345	{
		1346	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1347	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1348
349	w->active = active;	1349	w->active = active;
		1350	ev_ref (EV_A);
350	}	1351	}
351		1352
352	static void	1353	inline void
353	ev_stop (struct ev_watcher *w)	1354	ev_stop (EV_P_ W w)
354	{	1355	{
355	if (w->pending)	1356	ev_unref (EV_A);
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	1357	w->active = 0;
359	/* nop */
360	}	1358	}
361		1359
		1360	/*****************************************************************************/
		1361
362	void	1362	void
363	evio_start (struct ev_io *w)	1363	ev_io_start (EV_P_ struct ev_io *w)
		1364	{
		1365	int fd = w->fd;
		1366
		1367	if (expect_false (ev_is_active (w)))
		1368	return;
		1369
		1370	assert (("ev_io_start called with negative fd", fd >= 0));
		1371
		1372	ev_start (EV_A_ (W)w, 1);
		1373	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1374	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1375
		1376	fd_change (EV_A_ fd);
		1377	}
		1378
		1379	void
		1380	ev_io_stop (EV_P_ struct ev_io *w)
		1381	{
		1382	ev_clear_pending (EV_A_ (W)w);
		1383	if (expect_false (!ev_is_active (w)))
		1384	return;
		1385
		1386	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1387
		1388	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1389	ev_stop (EV_A_ (W)w);
		1390
		1391	fd_change (EV_A_ w->fd);
		1392	}
		1393
		1394	void
		1395	ev_timer_start (EV_P_ struct ev_timer *w)
		1396	{
		1397	if (expect_false (ev_is_active (w)))
		1398	return;
		1399
		1400	((WT)w)->at += mn_now;
		1401
		1402	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1403
		1404	ev_start (EV_A_ (W)w, ++timercnt);
		1405	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
		1406	timers [timercnt - 1] = w;
		1407	upheap ((WT *)timers, timercnt - 1);
		1408
		1409	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1410	}
		1411
		1412	void
		1413	ev_timer_stop (EV_P_ struct ev_timer *w)
		1414	{
		1415	ev_clear_pending (EV_A_ (W)w);
		1416	if (expect_false (!ev_is_active (w)))
		1417	return;
		1418
		1419	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1420
		1421	if (expect_true (((W)w)->active < timercnt--))
		1422	{
		1423	timers [((W)w)->active - 1] = timers [timercnt];
		1424	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1425	}
		1426
		1427	((WT)w)->at -= mn_now;
		1428
		1429	ev_stop (EV_A_ (W)w);
		1430	}
		1431
		1432	void
		1433	ev_timer_again (EV_P_ struct ev_timer *w)
364	{	1434	{
365	if (ev_is_active (w))	1435	if (ev_is_active (w))
		1436	{
		1437	if (w->repeat)
		1438	{
		1439	((WT)w)->at = mn_now + w->repeat;
		1440	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1441	}
		1442	else
		1443	ev_timer_stop (EV_A_ w);
		1444	}
		1445	else if (w->repeat)
		1446	{
		1447	w->at = w->repeat;
		1448	ev_timer_start (EV_A_ w);
		1449	}
		1450	}
		1451
		1452	#if EV_PERIODICS
		1453	void
		1454	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1455	{
		1456	if (expect_false (ev_is_active (w)))
366	return;	1457	return;
367		1458
368	int fd = w->fd;	1459	if (w->reschedule_cb)
		1460	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1461	else if (w->interval)
		1462	{
		1463	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1464	/* this formula differs from the one in periodic_reify because we do not always round up */
		1465	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1466	}
369		1467
370	ev_start ((struct ev_watcher *)w, 1);	1468	ev_start (EV_A_ (W)w, ++periodiccnt);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1469	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
372	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1470	periodics [periodiccnt - 1] = w;
		1471	upheap ((WT *)periodics, periodiccnt - 1);
373		1472
374	++fdchangecnt;	1473	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;
377	}	1474	}
378		1475
379	void	1476	void
380	evio_stop (struct ev_io *w)	1477	ev_periodic_stop (EV_P_ struct ev_periodic *w)
381	{	1478	{
		1479	ev_clear_pending (EV_A_ (W)w);
382	if (!ev_is_active (w))	1480	if (expect_false (!ev_is_active (w)))
383	return;	1481	return;
384		1482
385	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1483	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
386	ev_stop ((struct ev_watcher *)w);
387		1484
388	++fdchangecnt;	1485	if (expect_true (((W)w)->active < periodiccnt--))
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1486	{
390	fdchanges [fdchangecnt - 1] = w->fd;	1487	periodics [((W)w)->active - 1] = periodics [periodiccnt];
391	}	1488	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1489	}
392		1490
		1491	ev_stop (EV_A_ (W)w);
		1492	}
		1493
393	void	1494	void
		1495	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1496	{
		1497	/* TODO: use adjustheap and recalculation */
		1498	ev_periodic_stop (EV_A_ w);
		1499	ev_periodic_start (EV_A_ w);
		1500	}
		1501	#endif
		1502
		1503	void
394	evtimer_start (struct ev_timer *w)	1504	ev_idle_start (EV_P_ struct ev_idle *w)
395	{	1505	{
396	if (ev_is_active (w))	1506	if (expect_false (ev_is_active (w)))
397	return;	1507	return;
398		1508
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1509	ev_start (EV_A_ (W)w, ++idlecnt);
400	if (w->is_abs)	1510	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409
410	ev_start ((struct ev_watcher *)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	1511	idles [idlecnt - 1] = w;
413	upheap (timercnt - 1);
414	}	1512	}
415		1513
416	void	1514	void
417	evtimer_stop (struct ev_timer *w)	1515	ev_idle_stop (EV_P_ struct ev_idle *w)
418	{	1516	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	1517	ev_clear_pending (EV_A_ (W)w);
420	if (!ev_is_active (w))	1518	if (expect_false (!ev_is_active (w)))
421	return;	1519	return;
422		1520
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D
424	if (w->active < timercnt)
425	{
426	timers [w->active - 1] = timers [--timercnt];	1521	idles [((W)w)->active - 1] = idles [--idlecnt];
427	downheap (w->active - 1);	1522	ev_stop (EV_A_ (W)w);
428	}
429
430	ev_stop ((struct ev_watcher *)w);
431	}	1523	}
432		1524
433	void	1525	void
434	evsignal_start (struct ev_signal *w)	1526	ev_prepare_start (EV_P_ struct ev_prepare *w)
435	{	1527	{
436	if (ev_is_active (w))	1528	if (expect_false (ev_is_active (w)))
437	return;	1529	return;
438		1530
439	ev_start ((struct ev_watcher *)w, 1);	1531	ev_start (EV_A_ (W)w, ++preparecnt);
440	array_needsize (signals, signalmax, w->signum, signals_init);	1532	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
441	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1533	prepares [preparecnt - 1] = w;
442	}	1534	}
443		1535
444	void	1536	void
445	evsignal_stop (struct ev_signal *w)	1537	ev_prepare_stop (EV_P_ struct ev_prepare *w)
446	{	1538	{
		1539	ev_clear_pending (EV_A_ (W)w);
447	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
448	return;	1541	return;
449		1542
450	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1543	prepares [((W)w)->active - 1] = prepares [--preparecnt];
451	ev_stop ((struct ev_watcher *)w);	1544	ev_stop (EV_A_ (W)w);
		1545	}
		1546
		1547	void
		1548	ev_check_start (EV_P_ struct ev_check *w)
		1549	{
		1550	if (expect_false (ev_is_active (w)))
		1551	return;
		1552
		1553	ev_start (EV_A_ (W)w, ++checkcnt);
		1554	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1555	checks [checkcnt - 1] = w;
		1556	}
		1557
		1558	void
		1559	ev_check_stop (EV_P_ struct ev_check *w)
		1560	{
		1561	ev_clear_pending (EV_A_ (W)w);
		1562	if (expect_false (!ev_is_active (w)))
		1563	return;
		1564
		1565	checks [((W)w)->active - 1] = checks [--checkcnt];
		1566	ev_stop (EV_A_ (W)w);
		1567	}
		1568
		1569	#ifndef SA_RESTART
		1570	# define SA_RESTART 0
		1571	#endif
		1572
		1573	void
		1574	ev_signal_start (EV_P_ struct ev_signal *w)
		1575	{
		1576	#if EV_MULTIPLICITY
		1577	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1578	#endif
		1579	if (expect_false (ev_is_active (w)))
		1580	return;
		1581
		1582	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1583
		1584	ev_start (EV_A_ (W)w, 1);
		1585	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1586	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1587
		1588	if (!((WL)w)->next)
		1589	{
		1590	#if _WIN32
		1591	signal (w->signum, sighandler);
		1592	#else
		1593	struct sigaction sa;
		1594	sa.sa_handler = sighandler;
		1595	sigfillset (&sa.sa_mask);
		1596	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1597	sigaction (w->signum, &sa, 0);
		1598	#endif
		1599	}
		1600	}
		1601
		1602	void
		1603	ev_signal_stop (EV_P_ struct ev_signal *w)
		1604	{
		1605	ev_clear_pending (EV_A_ (W)w);
		1606	if (expect_false (!ev_is_active (w)))
		1607	return;
		1608
		1609	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1610	ev_stop (EV_A_ (W)w);
		1611
		1612	if (!signals [w->signum - 1].head)
		1613	signal (w->signum, SIG_DFL);
		1614	}
		1615
		1616	void
		1617	ev_child_start (EV_P_ struct ev_child *w)
		1618	{
		1619	#if EV_MULTIPLICITY
		1620	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1621	#endif
		1622	if (expect_false (ev_is_active (w)))
		1623	return;
		1624
		1625	ev_start (EV_A_ (W)w, 1);
		1626	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1627	}
		1628
		1629	void
		1630	ev_child_stop (EV_P_ struct ev_child *w)
		1631	{
		1632	ev_clear_pending (EV_A_ (W)w);
		1633	if (expect_false (!ev_is_active (w)))
		1634	return;
		1635
		1636	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1637	ev_stop (EV_A_ (W)w);
452	}	1638	}
453		1639
454	/*****************************************************************************/	1640	/*****************************************************************************/
455	#if 1
456		1641
457	static void	1642	struct ev_once
458	sin_cb (struct ev_io *w, int revents)
459	{	1643	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
461	}
462
463	static void
464	ocb (struct ev_timer *w, int revents)
465	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
467	}
468
469	int main (void)
470	{
471	struct ev_io sin;	1644	struct ev_io io;
472
473	ev_init (0);
474
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);
477	evio_start (&sin);
478
479	struct ev_timer t[1000];	1645	struct ev_timer to;
		1646	void (*cb)(int revents, void *arg);
		1647	void *arg;
		1648	};
480		1649
481	int i;	1650	static void
482	for (i = 0; i < 1000; ++i)	1651	once_cb (EV_P_ struct ev_once *once, int revents)
483	{	1652	{
484	struct ev_timer *w = t + i;	1653	void (*cb)(int revents, void *arg) = once->cb;
485	evw_init (w, ocb, i);	1654	void *arg = once->arg;
486	evtimer_set_rel (w, drand48 (), 0);	1655
487	evtimer_start (w);	1656	ev_io_stop (EV_A_ &once->io);
488	if (drand48 () < 0.5)	1657	ev_timer_stop (EV_A_ &once->to);
489	evtimer_stop (w);	1658	ev_free (once);
		1659
		1660	cb (revents, arg);
		1661	}
		1662
		1663	static void
		1664	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1665	{
		1666	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1667	}
		1668
		1669	static void
		1670	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1671	{
		1672	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1673	}
		1674
		1675	void
		1676	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1677	{
		1678	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
		1679
		1680	if (expect_false (!once))
490	}	1681	{
491		1682	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
492	ev_loop (0);
493
494	return 0;	1683	return;
495	}	1684	}
496		1685
497	#endif	1686	once->cb = cb;
		1687	once->arg = arg;
498		1688
		1689	ev_init (&once->io, once_cb_io);
		1690	if (fd >= 0)
		1691	{
		1692	ev_io_set (&once->io, fd, events);
		1693	ev_io_start (EV_A_ &once->io);
		1694	}
499		1695
		1696	ev_init (&once->to, once_cb_to);
		1697	if (timeout >= 0.)
		1698	{
		1699	ev_timer_set (&once->to, timeout, 0.);
		1700	ev_timer_start (EV_A_ &once->to);
		1701	}
		1702	}
500		1703
		1704	#ifdef __cplusplus
		1705	}
		1706	#endif
501		1707

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